Mitsubishi Electric FR-A820-00046 Instruction Manual Page 295

Parameters
Speed control under Real sensorless vector control, vector control, PM sensorless vector control
Setting the torque bias amount using terminal 1 (Pr. 840 = "1, 2", Pr. 847, Pr. 848)
● Calculate the torque bias from the load input to terminal 1 as shown in the diagram below, and
then apply the torque bias.
● To set the torque bias amount with a voltage input to terminal 1, set Pr. 868 "Terminal 1 function
assignment" = "6".
● The torque bias amount (Pr. 847) and gain amount (Pr. 848) when descending (reverse motor
rotation when the Pr. 840 setting is "1", forward motor rotation when the setting is "2") can be set
in a range of 0 to 400%. When Pr. 847 or Pr. 848 = "9999", the setting is the same for both descending
and ascending (C16 to C19).
Pr. 840
Setting
1
2
Tab. 5-42:
NOTE
Input 0 to 10 V (torque command) to the terminal 1 that is used for the torque bias function. Any
negative input voltage is regarded as 0 V.
FR-A800
When ascending
(Forward motor rotation)
Bias amount
Torque command
terminal 1 gain
C18 (Pr. 920)
C17 (Pr. 919)
Torque command
terminal 1 gain
C16 (Pr. 919)
Voltage for
Pr. 846
(Reverse motor rotation)
Bias amount
Voltage for
Torque command
Pr. 846
terminal 1 bias
C16 (Pr. 919)
C17 (Pr. 919)
Torque command
terminal 1 gain
C18 (Pr. 920)
Setting the torque bias amount using terminal 1
Fall-time
torque bias
terminal 1
bias
Terminal 1
Pr. 848
input
Fall-time
Voltage for
torque bias
terminal 1
C19 (Pr. 920)
gain
Pr. 847
I002523E
Fall-time
torque bias
Voltage for
terminal 1
bias
C19 (Pr. 920)
Pr. 847
Terminal 1
Fall-time
input
torque bias
terminal 1
gain
Pr. 848
I002525E
When descending
(Reverse motor rotation)
Bias amount
C17 (Pr. 919)
Terminal 1
input
Voltage for
C19 (Pr. 920)
Voltage for
Pr. 846
(Forward motor rotation)
Bias amount
Voltage for
Pr. 846
Voltage for
C19 (Pr. 920
Terminal 1
input
C17 (Pr. 919)
I002524E
I002526E
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